Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49327a798eddf54…

MALICIOUS

PDF

49.5 KB Created: 2020-07-31 12:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dc157107ea8e1f5c311372cae71564e SHA-1: b8d01ca2c1f1bd0fbf526b67fa1e7d462f8761e7 SHA-256: a49327a798eddf54d99805f36eb485ab62a43121b338ac471803c1fe05732f8a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links redirects to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to "string theory book pdf", indicating a potential phishing or malware distribution attempt.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=string+theory+book+pdf
    • http://files.kyokanconnect.com/uploads/1/3/2/7/132710627/d46f7ae3.pdf
    • http://files.guide2tech4teachers.com/uploads/1/3/0/8/130874075/6341713.pdf
    • http://files.mootingsyndicate.org/uploads/1/3/1/4/131483253/lewotidedimitufemini.pdf
    • http://files.ajukmapparel4.com/uploads/1/3/0/7/130740490/4408239.pdf
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0427/8393/2582/files/muwexixamoxatudel.pdf
    • https://cdn.shopify.com/s/files/1/0434/0255/9655/files/xuzugepenolixazew.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/8799586665.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/64114238554.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/falololirenajali.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/jafapomesigusajuxef.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/11609306627.pdf
    • https://cdn.shopify.com/s/files/1/0431/5729/1169/files/kulojukodawog.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/fisogikavowit.pdf
    • https://cdn.shopify.com/s/files/1/0439/7400/0798/files/96698246938.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/xidijilagemur.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008534.bin
d0f95dd8f6eae4d8113ed67a8c432f335a6e3fd61a59e23e73b2b6f4275b1729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8534 5080 bytes
font_01_sfnt_off0000966b.bin
ee786dc8200ed99eea11e53e69b50c6953aef0d5652f2df36db7aa2ec3ae9811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x966B 10192 bytes

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